Hey there! Great to see your interest in getting Firefox on your wife's iPad. To download and install Firefox on her iPad, follow these simple steps:

Open the App Store on the iPad. In the search bar, type 'Firefox' and hit Enter. Look for the official Firefox app from Mozilla and tap on it. Tap the 'Get' button to start the download. Once the download is complete, the 'Get' button will turn into 'Open.' Tap on 'Open' to launch Firefox. And voila! You're all set to enjoy Firefox on the iPad. If you face any issues or have more questions, feel free to ask!

How can I download and install Firefox on my wife's i-Pad?

https://support.mozilla.org/en-US/kb/install-firefox-your-ipad-iphone-or-ipod

Note: Firefox is only available on devices with iOS 13.0 and above.